Do not use Parameter 1860 to compensate for a worn ballscrew or loose coupling. Fix the mechanical problem first.
Parameter 1850 acts as an editable offset applied on top of the raw encoder data. When you change Parameter 1850:
: The internal computer calculates the discrepancy between the mechanical "Zero" and the current digital encoder count. fanuc parameter 1860 full
: Users generally cannot change 1860's value manually in a "meaningful way" because it is a direct feedback value from the hardware. Axis Droop
Understanding FANUC Parameter 1860: The Complete Guide to Position Deviation Limits Do not use Parameter 1860 to compensate for
The key to working safely with Parameter 1860 is to , refer to your machine's original documentation , and never assume uniform behavior across different platforms. When in doubt, consult with the machine tool builder or a qualified FANUC service technician before making adjustments.
It is important to note that the function of Parameter 1860 can vary by control series and software version. In some FANUC documentation, it is also described as the "First acceleration for Two-Stage Backlash Acc. function". Backlash acceleration is a feature to improve the response of an axis when it reverses direction. By defining a first acceleration value, the control can "kick" the axis more aggressively out of a reversal point to overcome mechanical play, then settle into a smoother acceleration profile. When you change Parameter 1850: : The internal
To understand why Parameter 1860 changes on its own, it helps to look at the process flow of a standard Fanuc Absolute Position System :